Sorry it took me so much to answer... I thought I'd already answered.
Here is some useful maths stuff (I had them bookmarked, but I don't know if they are all useful):
http://www.s-cool.co.uk/a-level/maths
http://www.examsolutions.net/maths-revision/index.php
http://www.onlinemathlearning.com/a-level-maths.html
http://www.mathisfunforum.com/login.php?action=in
http://www.mathsrevision.net/content/level-revision-section
http://www.mathsnetalevel.com/index.php?mode=syllabus&s=CIE_
I'm doing physics too and I found some useful stuff on the extremepapers forum... search on there, because I can't find the link.
